Universal gear-speed transformer



W. NATISCH UNIVERSAL GEAR SPEED TRANSFORMER Filed Dec. 31, 1924 6drivers to Patented June 29, 1925.

ATENT WW WILLLAM HA'IISGH, MALVEENE, NEW YORK.

UNIVERSAL GEAR-SPEED TEANSIFQRHFELB.

Apnlioation filed Beoemher 31,1324. Serial Ho. i'fillgfidl.

This invention relates to improvements in gear speed transformers,particularly speed reducing gear arrangements to high speeds of electricmotors of spur gears which the driving and the are so arr reduce the andsimilar lower working speeds by the use anged, that driven shafts are incoaxial alignment with each other, and it is the principal object ofvide a speed changing speed of the driving she. the driven shaft with annumber of spur gears, and 1s duced.

Another object of the invention the invention to pro ear in which the tis transmitted to exceptionally small greatly reis the p1 0- vision 01'a speed transformer allowing the changing of the speed variations withina considerable range by of the gears with facility time withoutdisturbing or casing.

A further object provision of a speed "chang the exchange of some andcase 111 a short the main gear train of the invention is the ng gear ofthis class with an internal revolving body having two integral gearsseparated by a central web and in mesh with a on fixed centers, one ofdriving plate for the driven I obtain these objects by sets of gears,driven by the lnrality of gears ich is keyed to a shaft. combining twosame shaft, of

which one set of gears is adapted to reduce the speed of the drivenshaft, and the second set is adapted to either add to the decrease ofspeed or inhibit the same.

These and further objects and by which they are obtained by the mannermy invention, will become more fully apparent as thedescription beparticularly specified 111 claims;

In the accompanying drawing this disclosure material part of thereofproceeds, and will the appended then forming a Figure l is a sectionalside elevation of a speed changing device ing to my invention.

constructed accord- Figure 2 is an end view thereof seen in thedirection of arrow 2, and

Figure 3 13 a similar view of the device seen from the opposite endalong The spur gears ing device are arranged within having a flanged aplurality of holes 12 for the arrow 3,

forming my speed changs casing 10 foot part 11 provided with passage ofsuitable fastening means for securing the device to a door, wall orother suitablesupport. The front of the casing is elosed by e v theequipped with suitable flanges allowing the passage of the fasteningbolts, etc, 16.

A driving shaft 17 is journalled in'a hearing 35 formed in plate 10 ofthe casing and has keyed thereto a pinion 28 which meshes with a gear 29which revolves on a stud 30.

This stud is held by a disk of which is journalled in a bearing formedin plate 13. The driven shaft 33 is keyed into the central apertureofhub- 32 and the driving shaft 17 revolves in a smaller extension ofthe central aperture in halo in this manner hub 32 holds the two shaftsin axial alignment with each other. Gear 29 meshes into an internal gear27 and assuming that this ear stands still, it will by rotation of siatt1'? revolve planetary around pinion 28 driving disk 31 and shaft 33 at acertain reduced speed.

Driving shaft 1'? has keyed thereto, out-- side of the bearing 35 inplate 10* a pinion 31, the hub 3 18 in mesh with a gear 19 which iskeyed to a short shaft 20 yonrnalled in a bearing .36 of plate 10. Tothis shaft is keyed at its opposite end, within the casing a pinion 22which meshes into a second internal gear '23. This internal gear 23shares the same It was stated before, that the driven shaft rotates witha certain speed when internal gear 27 stands still. It will be clearhowever, that by means of gears l8-l9'--22 and 23 the internal gear 2?can be rotated by rotation of the driving shalt, and that the speed ofrotation depends on the ratio of gears 18l--%2, because the speed ofdisk 31' is reduced it internal gear 27 turns in the same direction asgear 29, and this is accomplished by these gears, 'By changing'the ratioof gear E 19, the rotating speed of internal gears 23-27 can be alteredand it is possible to bring the driven disk 31 an?- the driven shaft 33almost to a standsti l.

It will be clear that by this device a great reduction of speed can e acomplished with very few spur gear ratio oit'speed red by simpl Ychanging l8l9- for gear of a di er'ent ratio. These gears are locatedoutside of the housing 10 of the gear speed transformen They areprotected by the separable guard 15 and can be quickly removed, and thegears exchanged for gears of a different ratio having the same distancebetween their axes. This feature is of parshaft 33 within a wide rangeby simpl ex changing gears 18 and 19 for gears o different sizes Withoutresorting to any structural alterations. The manufacturer of this deviceis enabled to furnish transformers al most of any desired ratio withoutresorting to the manufacture of many stock sizes of the device. Eachsize can be made to cover many different ratios by equipping itwvithdifferent gears 18 and 19.

It will be clear that such changes may be made in the generalarrangement and in the construction of the minor details of my in-,vention as fall within the scope of the appended claims withoutdeparture from the spirit of my invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent is 1. In a speed changing device of the kinddescribed, a support, a driving shaft and a driven shaft journaledthereon in co-axial 1 alignment with each other, a pair of spur gears onsaid driving shaft, a pair of in ternal gears oosely mounted on saiddriving shaft, a planetary gear held on said driven shaft meshing intoone of said spur gears, a pair of compound gears, one of said internalgears being driven by one of said compound gears, the other compoundgear driven by said second spur gear being mounted to form a pair ofchange gears with the same, and the second internal gear being arrangedto drive said planetary gear;

2. In a speed changing device of the kind described, a gear housing, adriving shaft and a driven shaft held in co-axial alignment with eachother by journals on said housing, aspurfgear on said driving shaftoutside of said housing, a second spur gear thereon, a planetary gearmeshing into said second spur gear. an internal gear driving saidplanetary gear, all within said housing.

and a pair 0t compound gears, one of said compound gears being arrangedwithin said, housing to drive said internal gear, and the other compoundgear'heing located outside of said housing in mesh. with the'first namedspur gear on said driving shaft.

A speed transformer of the kind described comprising a support, a highspeed common axis in journas on'said support, two spur gears on saidhigh speed shaft, one being located outside of the journal for said.shaft, and the other between said journals,

a planetary gear in mesh therewith held on said low speed shaft, aninternal gear to drive said planetary gear, and'a pair of compoundgears, one of said compound gears being adapted to drive said internalgear, and the other meshing into the spur gear located outside of saidsupport to form with the same a pair of change gears for quickalteration of the speed ratio of the transformer.

t. A speed transformer of the kind described comprising a casing, a highspeed shaft entering one side of said casing, a low speed shaft arrangedon a common axis with saidhigh'speed shaft entering the opposite side ofsaid casing, an internal gear, a planetary gear therein driving said lowspeed shaft, a pinion to drive said planetary gear, and a second piniont drive said internal gear, all arranged w" .n said casing, a stub shaftfor said second pinion journaled on said housing, and a. pair of changegears outside of said housing, one of said change gears being mounted onsaid stub shaft, and the other on said high speed shaft. o

5. In a gear speed transformer of the kind described, a casing, a highspeed shaft and a low speed shaft held 'on a common axis in journals on,said casing, a sun gear on said high speed shaft, an internal gear, aplanetary gear for driving said low, speed shaft in mesh with said sungear and Said-internal gear, a gear and pinion forming'pieans to rotatesaid internal gear all enclosedin Said casing, and a pair of changegears driven by said high speed shaft outside of said casing, one ofsaid change gears being mounted to drive said pinion.

6, A speed changing device of the kind dcscrihed comprising, a support,a pair of shafts held in journals on said support, a sun-gear,an'internal gear and a planetary gear, in mesh witheach other andmounted to transmit motion from one of said shafts turning at high speedto the other shaft at lower speed, means to rotate said internal gearand a pair of gears driven by said high speed shaft arranged to operatesaid. rotating means and forming'means to vary the ratio of speedtransmission between said shafts by theexchange of said gears for shaftand a low speed shaft arranged on a v described comprising a casingholding a pair of shafts in allnement on a common axis, an internal gearrotatably mounted on one of said, shafts, a pinion fastened to saidshaft, 5 a planetary gear driven thereby rotating ivithin said internalgear, and drivingthe second shaft at reduced speed, a pair ofexchangeable gears on the outside of said casing geared =o. saidinternal gear forming 10 means to vary its speed of rotation byreplacing said gears by others of different diameters.

8. A speed transformer of the kind described comprising a high-speedshaft and a low speed shaft having a common axis, a 15' planetary gearheld on one shaft and geared to-the other shaft and surrounded by an 1n-'tei'nal -gear loosely mounted on the second one; of said shafts,g.-ared means held on said casing to rotatesaid internal gear and I0exchangeable means to impart different speeds to said internalgearoutside of said. casing. i i 5 Signed at Brooklyn,- 1n the county'ofKings and State of New York this 29 day of 25- December A. D; 1924.

WILLIAM NATISCH.

